// import {add,isOdd} from './math.js';
// console.log(add(1,2));
// console.log(isOdd(12));

// import {add as jia} from './math.js';
// console.log(jia(1,21));

setTimeout(async() => {
    const result=watch(
      source,
      async (nextsource) => {
        
      },
      {
        immediate: true,
      }
    );
     import('./math.js');
}, 2000);